Crusher plate, head, and the like.



PATBNTED MAR. 31, 1908. M. OANDA. E, HEAD, AND THE LIKE. APPLICATION nun mm. 26, 1006.

2 sums-sum 1.

V TL Y ATTORNEYS No. 883,619. I

. F. GRUSHBR PLAT F. M. GANDA. GRUSHER PLATE, HEAD, AND THE LIKE.

APPLICATION FILED MAR. 26, 1906.

2 SHEETS-SHEET 2.

- WITNESSES: /T INVENTQR yvahx w BY Maulnaw,

ATTORNEYS PATENTED M R. 31, 1908; A

- wearing plate or element hard material, projecting ref a liner ring for such UNITED STATES FERDINANI) MORA 'CANDA, OF NEW YORK, N. Y.

cnusrma rum, HEAD, AND rim m.

Specification of Letters Patent.

tamed March 31,

Application filed larch 213, 1906. Serial No. 807,996.

To all cvhom it may concern:

Be it known that I, FERDINAND MORA OANDA, a citizen of the United States, resid ments of such crushers, and-consists in a comprising ribs of softer and usually tougher material cast about their bases, and in other features of in vention, all as more fully hereinafter described and pointed out in the claims.

The objects of my invention are to improve the construction of thewearing elements of rock crushers and the like; to make the same stronger, harder and more durable and less expensive; and to facilitate the manufacture of such elements to fit the crushing, ap aratus of different manufacturers.

I wil now roceed to describe my invention with reerence to the accompanying drawings,illustrating the ap lication of the invention to certain types 0 rock crushers, and will then point out the novel features inclaims.

In the said drawings: Figure 1 shows a vertical section of one Well known type of rock crushers; Figs. 2, 3 and 4 are similar sections of crusher plates for a rock crusher of the type shown in Fig. 1, showing how by'difierent spacing of the cast-in ribs of such plate one typeand size of rib may be used in producing crusher plates for different sizes and makes of rock crusher. Fig. 5 is a sectional view similar to Fig. 2, illustrating an alternative construction. Fig. 6 is a central vertical section of a portion of a gyratory crusher, illustrating the application of my invention thereto; Fig. 7 is a detail elevation of a head for such a machine constructed in accordance with my invention; and Figs. Sand 9 show respectively an elevation, and a part elevation and part transverse a machine, constructed in accordance with my invention.

' Rock crushers, as for example j aw crushers sive material.

from a backing of section, v likewise such as shown in Fig. 1, are provided with re-- movable face plates, since these faces are subject to excessive wear and mustbe renewed from time to time. These faces or wearing plates are commonly rovided with teeth, ribs or corrugations. 0 reduce their wear so far as possible, these plates, which are customarily made integral, are made of very hard material, as for example, chilled cast-iron or manganese steels-the latter a very ex en- Not only must these p ates be very hard, but the must be uite strong and preferably shou d be toug and not brittle, though it is difficult to find a material which has at once the requisite hardness and the requisite toughness;

'High carbon steel, such as tool steel, possesses to a high degree the qualities required for the faces of crusher plates, being very hard, particularly when properly tempered or hardened, and also having great surface toughness and so being not at all likely to crumble. However because of its high cost, and for other reasons, it is hardly practicable to make crusher plates entirely of forged tool steel. A cast plate made of such steel cannot be hardened or tempered without great risk of breaking during the hardening process.

According to my invention I produce crusher plates and similar wearing elements of rock crushers, by forming bars of high carbon steel or other hard steel of the proper section, placing such bars at suitable distances apart in a suitable mold, and pouring low carbon steel or cast-iron about the bases of these bars, thereby producing plates consisting of hard steel ribs, cast into a backing of cheaper and, usually, tougher material. When the backing is of low carbon steel, the heat of the molten steel and the pressure due to its solidification and shrinking about the bases of the cast-in ribs, is usual y sufficient to weld theseribs into the metal of the cast base,,such low carbon steel or iron being of relatively high melting point; but whether or not a weld be aimed at, I preferably form the bases of the ribs so that when the molten metal is cast about them said ribs are firmly locked .into the mass of the cast metal and are held immovably therein. Such a shaping of the base of the ribs aids materially 1n the roper in the plate as a whole and adds to its hfe. In this way I am able to produce crusher al, liflore- Y spacing the ribs at able to produce -e standard makes my enabled to an orders ial forms of or the plates is bars they can not given non shape and dimen- 1 .1- but they are guy a nbrous structure as hen these are assembled to gi t-o the desired or ash-er face and soft steel is cast abouttheir bases, compound plate is produced having the tool steel bars protruding from, and lorming the face of, a relatively working portions or heads, having projecting large mass of metal.

Wnile a tool steel bar the character described cannot well'be given a fractional tempering,;or a tempering on. one faeeonly, in combination with the mass of metal such a fractional tempering be easily given. Upon plunging the heated compound plate in water, the eX posed. angle faces of course take a temper while thcbod'y of the bar, or its base, being surrounded. by a mass oi" not metal, chilling but slowly by. conduction, does not take a temuer but remains tough and fibrous.

tempo ing operation of course produces but little effect on the soft. metalof the base.

The

Referrlngnow to the accompanying draw- .ings and at first to Fig. 1: numerals l and 2 designate wearing-plates such as above referred -toand such as may be constructed according to my invention, the former of said 1ates being carried by the main frame 3; and the plate 2 being carried by the jaw 5. Ihave shown the familiar toggle mechanism 6 for operating jaw Numerals 7 designate the above mentioned ribs of plates 1 and 2.

- Referring now'to Figs. 2, 3 and 4, which are similar views showing how by spacing the ribs differently, I am able to produce plates of different dimensions, numerals '7 designate the said ribs and. 8 the cast backing therefor. 1 preferably form these ribs with working por 'tions of substantially triangular sections, said from their rear sides, base )ortions 9 flanged slightly as shown. Ribs ol this section may Lvery readily by rolling, and may In making a th desired.

, r er distances apart ina mold for i molten metal to form the backieir bas'e portions as istal surrounding l c crticns, and ti I h the ribs, ma

sirgg only one or of such ribs, the said ribs are lovable when the cast interlock the ribs mes term perroraway aplatewith very hard surfer-sand a very tough back may be secured.

which have been rolled or fm'ged, as a mate rial which has been. so worked has a fiber better ac lapting it to resist abrasion than cast material. Also, the forged material can be tempered readily, while a cast steel of suifi cient carbon to take temper, would, in all igs. c, '1'

lilj/dIlVGHblOIl to a crusher of thegyratory type, In Figs. 6 and 7 numeral 11 desigribs as illustrated in the preceding figures. I may make either the head 11 or the rings 12 or both according to my invention, and in r Fig. 8 have illustrated one section of such a rin so formed such rings being usually bui t up of a number of segments or sections. When iorming the segment of the ring of the gyratory crusher, according to my invention, 1 commonly use flat headed ribs and lace them close together so that practically a smooth surface is formed. And I may use similar ribs similarly arranged to form flat wearing surfaces for an other crusherclcment. Thus, in Fig. 5 have shown ribs so arranged for a crusher plate of a jaw crusher. The advantage of forming the wearing sur faces of the plate or other crusher element by means of'separate ribs cast into a base, insteadof fornting such Wearing face in one piece is, that thereby Ifam able to harden or temper the ribs without destructive Warping or breaking suchas would. inevitably occur it the hardened surface were in one piece. As is well known, steel when hardened or temless, due provision be made for this change in form the hardening or ti surface, is s securedjlo a escribed, the

if of steel, being customarily of such low great extent, but remains tough. In this In general I prefer to make the ribs of bars and S l have illustrated the application or" nates a head. for such crusher having cast-1n pered undergoes slight change in form. Un-

c causes ms of such bases, as

probability, break during the ternpering in%element as a whole,

several ribs maybe hardened and tempered:

without change in form of the plate or' wear.

hat I claim is 1'; A wearing face or element hard ribs forming a" ractically continuous crushing surface, eac provlded with a reduced lower portion of a shape adapted to interlock with a base and a softer and tougher cast metal baseengag- I ing, interlocked with and shrunk on said reduced lower portions and fillingthe space therebetween. 1

a base, and aT-softe'r and tougher cast metal base engaging, interlocked Wltll-StIlCi shrunk on said reduced lower portions andfiiling steel, said series of ribs together forminga the space therebetween.

3. A Wearing face or element for rock crushers and the like,'comprising a-series of angle-faced ribs; of high carbon steel, each of said ribs being provided with a reduced lower portion of a shape adapted t o inter.

lockwitha base, and a cast metal baseof low carbon steel cast around, engaging, interlocked with and shrunk on 'said reduced lower portionsand' filling the space-there between.

ribs having heads and reduced lower porfor rock 'crushers and the 11ke compr1s1ng a series of of said ribsbeing rac- I 4. A wearing face or element for crushers and the like, comprising a series of and to her cast n etal base enveloping said fianged lower portions, shrunk thereon and filling the? spaces therebetween.

5. A-wearing face br-element for rock crush'ers and the likejcomprlsmg a series of ribs having heads and base portions, the

latter being reduced audprovided with per fo'rations, and a softer. and tougher cast metal base" enveloping'and shrunken said reduced lower portions; and entering -he perforations.

6. A wearing ,face or-element for rock crushers and the llke, com rising a series of angle-faced hardened stee ribs having reduced lower portions, said series together forming a practically continuous crushin face, and a softer and tougher castmeta base. enveloping said reduced lower portions, shrunk thereon and filling the spaces therebetween.

7v A wearing face or element for rock crushers and the like, corn risin a series ofangle-faced rolled ribs of fi rous gh carbon substantially continuous crushing f'ace'and said ribs below said face being provided with reduced lower rtions, and asoft, cast,

low carbon base )JHZQ enveloping such re duced portions an shrunk thereon and filling the space therebetween, such low carbon in the presence of two witnesses FERDINAND MORA CANDA." .Witnesses:

, H, M; MARBLE,

Q MAY 1. TRIMBLE. 

